B Switch On The Appliance; B Press The Reset Button For 3 Seconds And Release It; After Releasing The Appliance Re-Starts; Go To 7 - Worcester CDi Combi N.G Service Booklet

EA
and RESET button and fault indicator LED are flashing.
During operation: flame not detected.
Check
B Switch OFF the appliance.
5.
B Disconnect the boiler power
connection.
Is the earth connection correct?
6. Is the condensate trap blocked?
7. Is diaphragm in air/gas manifold fitted
correctly (see installation
instructions)?
B Open air/gas manifold.
B Check diaphragm for correct
orientation, soiling and splitting.
Is diaphragm OK?
8. Check the gas valve.
B Switch OFF the appliance.
B Un-plug the connectors from the
gas valve.
B Measure the gas valve coils I and
II electrical resistance.
R = 164± 40 Ω?
B Remove gas valve and check inlet filter
for blockage.
Tab. 25 EA Error codes
8 716 115 748 (2009/09)
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
B Reconnect the appliance power connection.
yes:

B Switch ON the appliance.

EA? go to 6
B Correct the electrical connection.
no:
B Reconnect the appliance power connection.
B Switch ON the appliance.

B Press the reset button for 3 seconds and release it.

After releasing the appliance re-starts.

EA? go to 6
yes: B Clean out condensation trap discharge pipe.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
EA? go to 7

go to 7

no:
B Close air/gas manifold (see installation
yes:
instructions).
go to 8
B Insert diaphragm in the fan intake tube as per
no:
installation instructions so that the flaps open
upwards.
B Close air/gas manifold (see installation
instructions).
EA? go to 8
B Reconnect the connectors.
yes:
B Switch ON the appliance.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
EA? go to 9
B Turn off gas valve.
no:
B Disconnect the boiler power connection.
B Change the gas valve.
B Open the gas valve.
B Reconnect the connectors.
B Reconnect the appliance power connection.
B Switch ON the appliance.
B Check appliance for leaks.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
EA? go to 9
RECTIFYING FAULTS
45